Magnetic Noise in Induction Motors

摘要

Noise in large high voltage induction motors (500Hp -8000Hp) may be airborne or magnetic in nature. Usually, arge high voltage induction motors are custom built and ailored to meet customer's demand. Since every motor is anique in its design, it is imperative to predict accurately the nagnetic noise generation during design phase, this way voiding expensive rework cost and not loosing the customer onfidence. Stator - rotor mechanical design, along with careful electrical coil design, can significantly cut down nagnetic noise in an induction motor. This paper discusses the arious causes and control of magnetic noise in large induction notors. Theoretical noise predictions in large induction notors, along with measured experimental noise data, are aresented.